Energy Storage Device and Method of Production Thereof

ABSTRACT

The present invention relates generally to the fields of electrical engineering and electronics. More specifically, the present invention relates to passive components of electrical circuitry and more particularly to energy storage devices and method of production thereof.

CROSS-REFERENCE

This application is a continuation of U.S. patent application Ser. No.14/710,480 filed May 12, 2015, which is entirely incorporated herein byreference. U.S. patent application Ser. No. 14/710,480 claims thebenefit of U.S. Provisional Application No. 61/991,861, filed May 12,2014, which is entirely incorporated herein by reference.

FIELD OF THE INVENTION

The present invention relates generally to passive components ofelectrical circuit and more particularly to energy storage devices andmethod of production thereof.

BACKGROUND OF THE INVENTION

A capacitor is a passive electronic component that is used to storeenergy in the form of an electrostatic field, and comprises a pair ofelectrodes separated by a dielectric layer. When a potential differenceexists between two electrodes, an electric field is present in thedielectric layer. This field stores energy and an ideal capacitor ischaracterized by a single constant value of capacitance which is a ratioof the electric charge on each electrode to the potential differencebetween them. In practice, the dielectric layer between electrodespasses a small amount of leakage current. Electrodes and leads introducean equivalent series resistance, and dielectric layer has limitation toan electric field strength which results in a breakdown voltage. Thesimplest energy storage device consists of two parallel electrodesseparated by a dielectric layer of permittivity ∈, each of theelectrodes has an area S and is placed on a distance d from each other.Electrodes are considered to extend uniformly over an area S, and asurface charge density can be expressed by the equation: ±ρ=±Q/S. As thewidth of the electrodes is much greater than the separation (distance)d, an electrical field near the centre of the capacitor will be uniformwith the magnitude E=ρ/∈. Voltage is defined as a line integral of theelectric field between electrodes. An ideal capacitor is characterizedby a constant capacitance C defined by the formula (1)

C=Q/V,  (1)

which shows that capacitance increases with area and decreases withdistance. Therefore the capacitance is largest in devices made ofmaterials of high permittivity.

A characteristic electric field known as the breakdown strength E_(bd),is an electric field in which the dielectric layer in a capacitorbecomes conductive. Voltage at which this occurs is called the breakdownvoltage of the device, and is given by the product of dielectricstrength and separation between the electrodes,

V _(bd) =E _(bd) d  (2)

The maximal volumetric energy density stored in the capacitor is limitedby the value proportional to ˜∈·E² _(bd), where c is dielectricpermittivity and E_(bd) is breakdown strength. Thus, in order toincrease the stored energy of the capacitor it is necessary to increasedielectric permeability ∈ and breakdown strength E_(bd) of thedielectric.

For high voltage applications much larger capacitors have to be used.There are a number of factors that can dramatically reduce the breakdownvoltage. Geometry of the conductive electrodes is important for theseapplications. In particular, sharp edges or points hugely increase theelectric field strength locally and can lead to a local breakdown. Oncea local breakdown starts at any point, the breakdown will quickly“trace” through the dielectric layer till it reaches the oppositeelectrode and causes a short circuit.

Breakdown of the dielectric layer usually occurs as follows. Intensityof an electric field becomes high enough free electrons from atoms ofthe dielectric material and make them conduct an electric current fromone electrode to another. Presence of impurities in the dielectric orimperfections of the crystal structure can result in an avalanchebreakdown as observed in semiconductor devices.

Other important characteristic of a dielectric material is itsdielectric permittivity. Different types of dielectric materials areused for capacitors and include ceramics, polymer film, paper, andelectrolytic capacitors of different kinds. The most widely used polymerfilm materials are polypropylene and polyester. Increase of dielectricpermittivity allows increasing of volumetric energy density which makesit an important technical task.

An ultra-high dielectric constant composite of polyaniline,PANI-DBSA/PAA, was synthesized using in situ polymerization of anilinein an aqueous dispersion of poly-acrylic acid (PAA) in the presence ofdodecylbenzene sulfonate (DBSA) (see, Chao-Hsien Hoa et al., “Highdielectric constant polyaniline/poly(acrylic acid) composites preparedby in situ polymerization”, Synthetic Metals 158 (2008), pp. 630-637).The water-soluble PAA served as a polymeric stabilizer, protecting thePANI particles from macroscopic aggregation. A very high dielectricconstant of ca. 2.0*10⁵ (at 1 kHz) was obtained for the compositecontaining 30% PANI by weight. Influence of the PANI content on themorphological, dielectric and electrical properties of the compositeswas investigated. Frequency dependence of dielectric permittivity,dielectric loss, loss tangent and electric modulus were analyzed in thefrequency range from 0.5 kHz to 10 MHz. SEM micrograph revealed thatcomposites with high PANI content (i.e., 20 wt. %) consisted of numerousnano-scale PANI particles that were evenly distributed within the PAAmatrix. High dielectric constants were attributed to the sum of thesmall capacitors of the PANI particles. The drawback of this material isa possible occurrence of percolation and formation of at least onecontinuous conductive path under electric field with probability of suchan event increasing with an increase of the electric field. When atleast one continuous path (track) through the neighboring conductingPANI particles is formed between electrodes of the capacitor, itdecreases a breakdown voltage of such a capacitor.

Single crystals of doped aniline oligomers are produced via a simplesolution-based self-assembly method (see, Yue Wang, et. al.,“Morphological and Dimensional Control via Hierarchical Assembly ofDoped Oligoaniline Single Crystals”, J. Am. Chem. Soc. 2012, 134, pp.9251-9262). Detailed mechanistic studies reveal that crystals ofdifferent morphologies and dimensions can be produced by a “bottom-up”hierarchical assembly where structures such as one-dimensional (1-D)nanofibers can be aggregated into higher order architectures. A largevariety of crystalline nanostructures, including 1-D nanofibers andnanowires, 2-D nanoribbons and nanosheets, 3-D nanoplates, stackedsheets, nanoflowers, porous networks, hollow spheres, and twisted coils,can be obtained by controlling the nucleation of the crystals and thenon-covalent interactions between the doped oligomers. These nanoscalecrystals exhibit enhanced conductivity compared to their bulkcounterparts as well as interesting structure-property relationshipssuch as shape-dependent crystallinity. Furthermore, the morphology anddimension of these structures can be largely rationalized and predictedby monitoring molecule-solvent interactions via absorption studies.Using doped tetra-aniline as a model system, the results and strategiespresented in this article provide insight into the general scheme ofshape and size control for organic materials.

There is a known energy storage device based on a multilayer structure.The energy storage device includes first and second electrodes, and amultilayer structure comprising blocking and dielectric layers. Thefirst blocking layer is disposed between the first electrode and adielectric layer, and the second blocking layer is disposed between thesecond electrode and a dielectric layer. Dielectric constants of thefirst and second blocking layers are both independently greater than thedielectric constant of the dielectric layer. FIG. 1 shows one exemplarydesign that includes electrodes 1 and 2, and multilayer structurecomprising layers made of dielectric material (3, 4, 5) which areseparated by layers of blocking material (6, 7, 8, 9). The blockinglayers 6 and 9 are disposed in the neighborhood of the electrodes 1 and2 accordingly and characterized by higher dielectric constant thandielectric constant of the dielectric material. A drawback of thisdevice is that blocking layers of high dielectric permittivity locateddirectly in contact with electrodes can lead to destruction of theenergy storage device. Materials with high dielectric permittivity whichare based on composite materials and containing polarized particles(such as PANI particles) might demonstrate a percolation phenomenon. Theformed polycrystalline structure of layers has multiple tanglingchemical bonds on borders between crystallites. When the used materialwith high dielectric permittivity possesses polycrystalline structure apercolation might occur along the borders of crystal grains. Anotherdrawback of the known device is an expensive manufacturing procedurewhich is vacuum deposition of all layers.

Capacitors as energy storage device have well-known advantages versuselectrochemical energy storage, e.g. a battery. Compared to batteries,capacitors are able to store energy with very high power density, i.e.charge/recharge rates, have long shelf life with little degradation, andcan be charged and discharged (cycled) hundreds of thousands or millionsof times. However, capacitors often do not store energy in small volumeor weight as in case of a battery, or at low energy storage cost, whichmakes capacitors impractical for some applications, for example electricvehicles. Accordingly, it would be an advance in energy storagetechnology to provide capacitors of higher volumetric and mass energystorage density and lower cost.

The present invention solves a problem of the further increase ofvolumetric and mass density of reserved energy of the energy storagedevice, and at the same time reduces cost of materials and manufacturingprocess.

SUMMARY OF THE INVENTION

The present invention provides an energy storage device comprising afirst electrode, a second electrode, and a solid multilayer structuredisposed between said first and second electrodes. Said electrodes areflat and planar and positioned parallel to each other, and said solidmultilayer structure comprises m homogeneous insulating and conductivelayers. Said layers are disposed parallel to said electrodes, and saidlayers has following sequence: A-B-(A-B- . . . A-B-)A, where A is aninsulating layer which comprises an insulating dielectric material, B isa conductive layer, and number of layers m is equal or more than 3.

In a yet further aspect, the present invention provides a method ofproducing an energy storage device, which comprises the steps of (a)preparation of a conducting substrate serving as one of the electrodes,(b) formation of a solid multilayer structure, and (c) formation of thesecond electrode on the multilayer structure, wherein formation of themultilayer structure comprises alternating steps of the application ofinsulating and conductive layers or a step of coextrusion of layers.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic illustration that shows an energy storage device.

FIG. 2 is a schematic illustration that shows an energy storage deviceaccording to an embodiment of the invention.

FIG. 3 is a schematic illustration that shows an energy storage deviceaccording to another embodiment of the invention.

DETAILED DESCRIPTION OF THE INVENTION

The general description of the embodiments of the present inventionhaving been made, a further understanding can be obtained by referenceto the specific preferred embodiments, which are given herein only forthe purpose of illustration and are not intended to limit the scope ofthe appended claims.

An energy storage device is disclosed herein. Depending on theapplication, dielectric permittivity of the insulating dielectricmaterial ∈_(ins) may be in the broad range; for most applications itwill be in the range between about 2 and 25. The insulating layercomprises a material characterized by a band gap of greater than 4 eVand by breakdown field strength in the range between about of 0.01 V/nmand greater than 2.5 V/nm. Due to high polarizability, the conductivematerial possesses relatively high dielectric permittivity ∈_(cond) incomparison with dielectric permittivity of the insulating dielectricmaterial. Thus, the layer comprising the conductive material possessesdielectric permittivity ∈_(cond), which 10-100,000 times greater thandielectric permittivity ∈_(ins) of the material of the insulating layer.Therefore the electric field intensity of the insulating layer E_(ins)and electric field intensity of the conductive layer E_(cond) satisfythe following ratio: E_(cond)=(∈_(ins)/∈_(cond))·E_(ins). Thereforeelectric field intensity E_(cond) is much smaller than electric fieldintensity E_(ins). Therefore in order to increase a working voltage ofthe energy storage device it is required to increase number of theinsulating layers.

Capacitor of the energy storage device according to the presentinvention is determined by the following expression:

C=[d _(ins) ·n _(ins)/(∈₀∈_(ins) S)+d _(cond)·(n _(ins)−1)/(∈₀∈_(cond)·S)]⁻¹==∈₀ ·S·[d _(ins) ·n _(ins)/∈_(ins) +d _(cond)·(n_(ins)−1)/∈_(cond)]⁻¹  (3)

where d_(ins) is thickness of the insulating layer, d_(cond) isthickness of the conductive layer, n_(ins) is number of the insulatinglayers, ∈₀ is dielectric permittivity of vacuum.

According to the formula (3), value of the capacitor of the energystorage device is determined by the layers with high dielectricpermittivity if the following inequality is carried out:

d _(cond)>>(n _(ins)/(n _(ins)−1)·(∈_(cond)/∈_(ins))·d _(ins) or

d _(cond) =p·(n _(ins)/(n _(ins)−1)·(∈_(cond)/∈_(ins))·d _(ins), wherep≧3,  (4)

if n _(ins)>>1 than d _(cond) =p·(∈_(cond)/∈_(ins))·d _(ins),  (5)

Thus, insulating layers provide a high breakdown voltage of thecapacitor, and conductive layers provide high dielectric permittivity ofthe multilayered structure.

In some embodiments of the invention, the solid insulating dielectriclayers may possess a different structure in the range between anamorphous and crystalline solid layer, depending on the material andmanufacturing procedure used.

In one embodiment of the disclosed energy storage device, the insulatinglayers comprise modified organic compounds of the general structuralformula I:

{Cor}(M)n,  (I)

where Cor is a polycyclic organic compound with conjugated π-system, Mare modifying functional groups; and n is the number of the modifyingfunctional groups, where n is ≧1. In one embodiment of the presentinvention, the polycyclic organic compound is selected from the listcomprising oligophenyl, imidazole, pyrazole, acenaphthene, triaizine,indanthrone and having a general structural formula selected fromstructures 1-44 as given in Table 1.

TABLE 1 Examples of polycyclic organic compounds for the insulatinglayers

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

In another embodiment of the present invention, the modifying functionalgroups are selected from the list comprising alkyl, aryl, substitutedalkyl, substituted aryl, and any combination thereof. The modifyingfunctional groups provide solubility of organic compounds at the stageof manufacturing and additional insulating properties to the solidinsulating layer of the capacitor. In yet another embodiment of thepresent invention, the insulating layers comprise polymeric materialsselected from the list comprising fluorinated alkyls, polyethylene,poly(vinylidene fluoride-hexafluoropropylene), polypropylene,fluorinated polypropylene, polydimethylsiloxane. In still anotherembodiment of the present invention, the insulating layers comprise apolymeric material formed on the basis of polymers which are selectedfrom the structures 45 to 50 as given in Table 2.

TABLE 2 Examples of polymers for the insulating layers

45 poly(2,2′-disulfo-4,4′-benzidine terephthalamide)

46 poly(2,2′-disulfo-4,4′-benzidine isophthalamide)

47 poly(2,2′-disulfo-4,4′-benzidine 1,3-dioxo-isoindoline-5-carboxamide)

48 poly(2,2′-disulfo-4,4′-benzidine 1H-benzimidazole-2,5-dicarboxamide)

49 poly(2,2′-disulfo-4,4′-benzidine 3,3′,4,4′-biphenyl tetracarboxylicacid diimide)

50 poly(2,2′ disulpho-4,4′ benzidine 1,4,5,8-naphtalen tetracarboxylicacid diimide)

The listed materials intended for the insulating layers provide a highintensity of an electric field which is not less than 0.1 Volt pernanometer.

A wide variety of conducting and semiconducting (conjugated) polymerscan be used as conductive layers of the present invention. This varietyof polymers have a unique set of properties, combining the electronicproperties of metals and semiconductors with the processing advantagesand mechanical properties of polymers, see A. J. Heeger, et al.,“Semiconducting and Metallic Polymers.”, Oxford Graduate Texts, OxfordPress, 2010.

For the disclosed energy storage device the solid conductive layer maypossess a different structure in the range between an amorphous andcrystalline solid layer, depending on the material and manufacturingprocedure used.

In one embodiment of the present invention the conductive layer iscrystalline.

In another embodiment of the present invention, the conductive layercomprises material possessing molecular conductivity. A conductivematerial possessing molecular conductivity refers to a materialcontaining organic molecules wherein electric charges are moved underaction of an external electric field within the limits of thesemolecules. As a result of displacement of mobile charges inside of thismolecule, an electric dipole oriented along the electric field is formed(Jean-Pierre Farges, Organic Conductors, Fundamentals and applications,Marcell-Dekker Inc. NY. 1994).

In one embodiment of the present invention, the conductive layerscomprise electroconductive oligomers. In another embodiment of thepresent invention, the longitudinal axes of the electroconductiveoligomers are directed predominantly perpendicularly in relation to theelectrode surface. In yet another embodiment of the present invention,the longitudinal axes of the electroconductive oligomers are directedpredominantly parallel in relation to the electrode surface.

In still another embodiment of the present invention, the conductivelayer comprising the electroconductive oligomers predominantly possesseslateral translational symmetry. Translational symmetry of the objectmeans that a shift on a certain vector does not change the object.

In one embodiment of the present invention, the electroconductiveoligomers are selected from the list comprising following structuralformulas corresponding to one of structures 51 to 57 as given in Table3.

TABLE 3 Examples of polymers for the conductive layers

51

52

53

54

55

56

57where X=2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12

In another embodiment of the energy storage device of the presentinvention, the conductive layer comprises low-molecular weightelectroconductive polymers. In another embodiment of the presentinvention, the low-molecular weight electroconductive polymer containsmonomers selected from the structures 50 to 56 as given in Table 3. Inanother embodiment of the disclosed energy storage device, theelectroconductive oligomers further comprise substitute groups and aredescribed by the following general structural formula II:

(electroconductive oligomer)--R_(q)  (II)

where R_(q) is a set of substitute groups, q is a number of thesubstitute groups R in the set R_(q), and q=1, 2, 3, 4, 5, 6, 7, 8, 9,or 10. In yet another embodiment of the present invention, thesubstituents R are independently selected from the list comprisingalkyl, aryl, substituted alkyl, substituted aryl, and any combinationthereof.

In still another embodiment of the present invention, thickness of theinsulating layer (d_(ins)), thickness of the conductive layer(d_(cond)), number of the insulating layers (n_(ins)≧2), dielectricpermittivity of the insulating dielectric material (∈_(ins)) anddielectric permittivity of the conductive layer (∈_(cond)) satisfy thefollowing relation:

d _(cond) =p·(n _(ins)/(n _(ins)−1)·(∈_(cond)/∈_(ins))·d _(ins), wherep≧3.  (6)

Electrodes of the disclosed energy storage device may be made of anysuitable material, including but not limited to Pt, Cu, Al, Ag or Au.

The disclosed energy storage device can be produced by a variety ofmanufacturing methods, which in general comprise the steps of a)preparation of a conducting substrate serving as one of the electrodes,b) formation of a multilayer structure, and c) formation of the secondelectrode on the multilayer structure. Formation of the multilayerstructure comprises either alternating steps of the application ofinsulating and conductive layers or a step of coextrusion of layers.

In one embodiment of the present invention the alternating steps of themultilayer structure formation comprise successive alternatingapplications of solutions of liquid insulating and conductive layers,wherein each application is followed with a step of drying to form asolid insulating and conductive layers. Depending on the required designof the energy storage device, in particular on the number of layers inthe multilayer structure, the alternating application steps are recurreduntil a formation of the multilayer structure is completed. In thisembodiment the insulating layer is formed as the first and the lastlayer of the multilayer structure, being in direct contact with theelectrodes.

In one embodiment of the present invention the alternating steps of themultilayer structure formation comprise successive alternatingapplications of melts of insulating and conductive layers, wherein eachapplication is followed with a step of cooling down to form a solidinsulating and conductive layers. Depending on the required design ofthe energy storage device, in particular on the number of layers in themultilayer structure, the alternating application steps are recurreduntil a formation of the multilayer structure is completed. In thisembodiment the insulating layer is formed as the first and the lastlayer of the multilayer structure, being in direct contact with theelectrodes.

In another embodiment of the present invention a step of coextrusion oflayers comprises a step of coextrusion of set of liquid layerssuccessively containing alternating conductive materials and insulatingdielectric materials onto the substrate, and followed by drying to formthe solid multilayer structure.

In another embodiment of the present invention a step of coextrusion oflayers comprises a step of coextrusion of set of layers successivelycontaining alternating melts of conductive materials and insulatingdielectric materials onto the substrate, and followed by drying to formthe solid multilayer structure.

Depending on the design of the energy storage device, in particular onthe number of layers in the multilayer structure, the extrusion may becompleted in one step or recurred until a formation of the multilayerstructure is completed. The insulating layer is formed in direct contactwith the electrodes.

In order that the invention may be more readily understood, reference ismade to the following examples, which is intended to be illustrative ofthe invention, but is not intended to be limiting in scope.

Example 1

Example 1 describes an energy storage device comprising a solidmultilayer structure of two insulating and one conductive layer.

The design of the energy storage device is shown in FIG. 2 and includeselectrodes 10 and 11 and a solid multilayer structure comprising twolayers of an insulating dielectric material (13 and 14) separated withone layer made of a conductive material (12). Polyaniline (PANT) wasused as a conductive material, and polyethylene was used as aninsulating dielectric material. Thickness of the insulating layer wasd_(ins)=25 nm. Electrodes 10 and 11 were made of copper. Dielectricpermittivity of polyethylene is equal to 2.2 (i.e. ∈_(ins)=2.2).Breakdown voltage is V_(bd)=40 kilovolt on thickness of 1 millimeter(0.04 v/nm); thus, a polyethylene film of 25-nm thickness had abreakdown voltage equal to 1 volt. Therefore a working voltage of thecapacitor did not exceed the breakdown voltage Vbd of two insulatinglayers with thickness 25 nm each which is approximately equal to 2 V.The conductive polymer material (polyaniline (PANI)) had dielectricpermittivity E_(cond) equal to 1000 and thickness of d_(cond)=50 pin.

Example 2

Example 2 describes an energy storage device comprising a solidmultilayer structure of alternating insulating and conductive layers.

The design of the energy storage device is shown in FIG. 3 and includeselectrodes 15 and 16 and a solid multilayer structure comprisingalternating layers of insulating and conductive materials, whereinlayers of an insulating dielectric material (20, 21, 22, 23) wereseparated by layers made of a conductive material (17, 18, 19).Polyaniline (PANI) was used as a conductive material and polyethylenewas used as an insulating dielectric material. Thickness of theinsulating layer was d_(ins)=25 nm. Electrodes 15 and 16 were made ofcopper. Dielectric permittivity of polyethylene is equal to 2.2 (i.e.∈_(ins)=2.2) and breakdown voltage is V_(bd)=40 kilovolt on thickness of1 millimeter. Thus, a polyethylene film of 25-nm thickness has abreakdown voltage equal to 1 volt. Therefore the working voltage of thecapacitor did not exceed breakdown voltage Vbd which was approximatelyequal to 4 V. The conductive polymer material possessing (polyaniline(PANI)) had dielectric permittivity ∈_(cond) equal to 1000. In thisexample thickness of the layer comprising a conductive material wasselected as d_(cond)=50 μm.

Example 3

Example 3 describes calculation of number and thickness of insulatinglayers depending on value of working voltage of the capacitor. Formanufacturing of energy storage device with a working voltage of 100volt a number of 25-nm thick the insulating layers shall be increasedand/or thickness of layers needs to be higher in order to create totalthickness of insulating material about 2500 nm. For industrialapplications manufacturing of the energy storage device withpolyethylene used as an insulating layer with 25-nm thickness of eachlayer, a desired working voltage will require more than 100 layers. Thisestimation is based on a breakdown voltage of V_(bd)=40 kilovolt onthickness of 1 millimeter. Dielectric permittivity of a conductivematerial in this example is equal to one hundred thousand (100,000).Thickness of each conductive layer is approximately equal to 300microns. At increasing of target working voltage up to 1000 volt, arequired number of the insulating layers and their thickness isincreased up to the D=N*d=25000 nm where D is total thickness of alllayers, N—is number of layers, and d—is thickness of each layer.

Although the present invention has been described in detail withreference to a particular preferred embodiment, persons possessingordinary skill in the art to which this invention pertains willappreciate that various modifications and enhancements may be madewithout departing from the spirit and scope of the claims that follow.

What is claimed is:
 1. An energy storage device comprising a firstelectrode, a second electrode, and a solid multilayer structure disposedbetween said first and second electrodes, wherein said electrodes areflat and planar and positioned parallel to each other, and wherein saidsolid multilayer structure comprises m insulating and conductive layers,said layers are disposed parallel to said electrodes, and said layershave the following sequence: A-B-(A-B- . . . A-B-)A, where A is ahomogeneous insulating layer which comprises an insulating dielectricmaterial comprising at least one modified organic compound of generalstructural formula I:{Cor}(M)n,  (I) where Cor is a polycyclic organic compound withconjugated π-system, M are modifying functional groups; and n is thenumber of the modifying functional groups, where n is equal to 1 ormore, B is a homogeneous conductive layer, and m is equal to 3 or more.2. An energy storage device according to claim 1, wherein the polycyclicorganic compound is selected from the group consisting of oligophenyl,imidazole, pyrazole, acenaphthene, triaizine, and indanthrone, and thepolycyclic organic compound has a general structural formula selectedfrom the grow) consisting of structures 1-44 as follows:


3. An energy storage device according to claim 1, wherein the modifyingfunctional groups are selected from the group consisting of alkyl, aryl,substituted alkyl, substituted aryl, and any combination thereof.
 4. Anenergy storage device according to claim 1, wherein said conductivelayers comprise electroconductive oligomers.
 5. An energy storage deviceaccording to claim 4, wherein longitudinal axes of the electroconductiveoligomers are directed predominantly perpendicularly to the electrodes.6. An energy storage device according to claim 4, wherein longitudinalaxes of the electroconductive oligomers are directed predominantlyparallel to the electrodes.
 7. An energy storage device according toclaim 5, wherein the electroconductive oligomers predominantly possesslateral translational symmetry.
 8. An energy storage device according toclaim 4, wherein the electroconductive oligomers are selected from thegroup consisting of structures 51 to 57 as follows:

where X=2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or
 12. 9. An energy storagedevice comprising a first electrode, a second electrode, and a solidmultilayer structure disposed between said first and second electrodes,wherein said electrodes are flat and planar and positioned parallel toeach other, and wherein said solid multilayer structure comprises minsulating and conductive layers, said layers are disposed parallel tosaid electrodes, and said layers have the following sequence: A-B-(A-B-. . . A-B-)A, where A is a homogeneous insulating layer which comprisesan insulating dielectric material comprising at least one polymericmaterial formed with units selected from structures 45 to 50 as follows:


10. An energy storage device according to claim 9, wherein saidconductive layers comprise electroconductive oligomers.
 11. An energystorage device according to claim 10, wherein longitudinal axes of theelectroconductive oligomers are directed predominantly perpendicularlyto the electrodes.
 12. An energy storage device according to claim 10,wherein longitudinal axes of the electroconductive oligomers aredirected predominantly parallel to the electrodes.
 13. An energy storagedevice according to claim 10, wherein the electroconductive oligomerspredominantly possess lateral translational symmetry.
 14. An energystorage device according to claim 10, wherein the electroconductiveoligomers are selected from the group consisting of structures 51 to 57as follows:

where X=2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or
 12. 15. An energy storagedevice comprising, a first electrode, a second electrode, and a solidmultilayer structure disposed between said first and second electrodes,wherein said electrodes are flat and planar and positioned parallel toeach other, and wherein said solid multilayer structure comprises minsulating and conductive layers, said layers are disposed parallel tosaid electrodes, and said layers have the following sequence: A-B-(A-B-. . . A-B-)A, where A is a homogeneous insulating layer which comprisesan insulating dielectric material, B is a homogeneous conductive layercomprising at least one electroconductive oligomer described by generalstructural formula II:(electroconductive oligomer)--R_(q)  (II) where R_(q) is a set ofsubstitute groups, and q is a number of the substitute groups R in theset R_(q), the substitute groups R are independently selected from thegroup consisting of alkyl, aryl, substituted alkyl, substituted aryl,and any combination thereof, and q equal to 1, 2, 3, 4, 5, 6, 7, 8, 9 or10, and m is equal to 3 or more.
 16. An energy storage device accordingto claim 15, wherein said conductive layers comprise electroconductiveoligomers.
 17. An energy storage device according to claim 16, whereinlongitudinal axes of the electroconductive oligomers are directedpredominantly perpendicularly to the electrodes.
 18. An energy storagedevice according to claim 16, wherein longitudinal axes of theelectroconductive oligomers are directed predominantly parallel to theelectrodes.
 19. An energy storage device according to claim 16, whereinthe electroconductive oligomers predominantly possess lateraltranslational symmetry.
 20. An energy storage device according to claim16, wherein the electroconductive oligomers are selected from the groupconsisting of structures 51 to 57 as follows:

where X=2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12